"We want to test so many different things, and we've tried a 4-5-1 formation," Teguramori told the Japanese Football Association website.

"We thought that it would be important to raise awareness of playing defence with the whole team.

"I wanted also the team to be on the same page regarding how we move on to attacking after getting the ball and who is going to initiate it.

"Kohrogi (Shinzoh) collaborates well with Endo (Wataru). He (Kohrogi) will not only improve the quality of our football by his post plays, but also with direct passes, which the team has emphasized throughout this training camp.

"While our players haven’t fully recuperated from the long trip, they have been conscious of the importance of attacking faster after retrieving the ball.

"On our first day of tactical training, the three over-aged moved more-or-less instinctively. I advised them on the significance of communication as they will be playing alongside different team-mates.

"Overall, I got the impression that they would make a significant impact to this team and, without a doubt, our football is going to be quicker.

"We have a variety of players who can play in the second row, so we are going to try out different combinations and formations."

Meanwhile, Japan will face hosts Brazil in a friendly game on Saturday.